1. bcprx.net (deposit required, but probably the best I've found)
2. luxsocks.ru
3. limeproxies.com
4. 5socks.net
5. unlimited-socks.com
6. naawy.com
7. winsocks.net
8. premsocks.com
9. seproxysoft.com
10. rs-socks.net
11. dichvusocks.us
12. truesocks.net
13. vip72.com
14. proxyrack.com
15. proxyfish.com
16. proxyradar.com/
17. proxybuy.com/en/
18. socks5proxies.net
19. yourprivateproxy.com/buy-private-proxies
20. socks-proxy.net